<template>
  <view>
    <!-- 商品列表渲染 -->
    <view class="goods-list">
      <u-swipe-action>
        <u-swipe-action-item v-for="item in cartList" :key="item.goods_id" :options="options"
          @click="swipeActionItemClick" :name="item.goods_id">
          <view class="cart-item">
            <!-- radio 小程序组件库自带的 -->
            <radio :checked="item.goods_select" color="#EB4450" @tap="changeSelect(item.goods_id)" />
            <view class="cart-count">
              <u-number-box :value="item.goods_count" :name="item.goods_id" @change="changeCount"
                @overlimit="overDel($event, item.goods_id)" />
            </view>
            <!-- hover-class="none" 取消链接组件按下时的灰色样式 -->
            <navigator class="goods-item" hover-class="none"
              :url="`/pagesA/goods_detail/goods_detail?goods_id=${item.goods_id}`">
              <!-- 商品图片 -->
              <image class="goods-image" :src="item.goods_small_logo" mode="aspectFit" />
              <!-- 商品信息 -->
              <view class="goods-info">
                <view class="goods-name">{{ item.goods_name }}</view>
                <view class="goods-price">{{ item.goods_price }}</view>
              </view>
            </navigator>
          </view>
        </u-swipe-action-item>
      </u-swipe-action>

    </view>

    <u-empty v-if="cartList.length === 0" mode="car" icon="http://cdn.uviewui.com/uview/empty/car.png">
      <navigator url="/pages/index/index" open-type="switchTab" hover-class="none">
        <u-button type="primary">去首页看看</u-button>
      </navigator>
    </u-empty>

    <!-- 底部操作栏占位 -->
    <view class="bottom-bar" v-else>
      <!-- 固定定位的操作栏  -->
      <view class="bottom-bar-fixed">
        <view class="select">
          <radio class="select-radio" :checked="allChecked" color="#EB4450" @tap="changeChecked">
            全选
          </radio>
          <text class="select-radio"></text>
        </view>
        <!-- 合计 -->
        <view class="total">
          <text class="total-name">合计：</text>
          <text class="total-price">{{ totalPrice }}</text>
        </view>
        <!-- 结算 -->
        <view class="account" @tap="gotoPay">去结算({{ totalCount }})</view>
      </view>
    </view>
  </view>
</template>

<script>
import { mapGetters, mapState } from 'vuex'
export default {
  data() {
    return {
      options: [
        {
          text: '删除',
          style: {
            backgroundColor: '#f56c6c',
          },
        },
      ],
    }
  },
  computed: {
    ...mapState(['cartList']),
    ...mapGetters(['allChecked', 'totalCount', 'totalPrice'])
  },
  onLoad(options) {
    // console.log(this.$store.state)
  },
  methods: {
    changeSelect(goods_id) {
      const cartList = [...this.cartList]
      const index = cartList.findIndex(v => v.goods_id === goods_id)
      cartList[index].goods_select = !cartList[index].goods_select
      this.$store.commit("setCartList", cartList)
    },
    changeCount({ value, name }) {
      const cartList = [...this.cartList]
      const index = cartList.findIndex(v => v.goods_id === name)
      cartList[index].goods_count = value
      this.$store.commit("setCartList", cartList)
    },
    overDel(type, goods_id) {
      if (type === 'minus') {
        uni.showModal({
          title: '温馨提示',
          content: '是否删除商品',
          confirmColor: '删除',
          confirmColor: '#f00',
          success: (res) => {
            if (res.confirm) this.delCart(goods_id)
          }
        })
      }
    },
    delCart(goods_id) {
      const cartList = [...this.cartList]
      const index = cartList.findIndex(v => v.goods_id === goods_id)
      cartList.splice(index, 1)
      this.$store.commit('setCartList', cartList);
    },
    swipeActionItemClick(val) {
      uni.showModal({
        title: '温馨提示',
        content: '是否删除商品',
        confirmColor: '删除',
        confirmColor: '#f00',
        success: (res) => {
          if (res.confirm) this.delCart(val.name)
        }
      })
    },
    changeChecked() {
      const bl = !this.allChecked
      const cartList = [...this.cartList]
      cartList.forEach(item => item.goods_select = bl)
      this.$store.commit('setCartList', cartList)
    },
    gotoPay() {
      if (this.totalCount === 0) {
        return uni.showToast({ icon: 'none', title: '请选择商品' })
      }
      uni.navigateTo({ url: '/pages/pay/pay' })
    }
  },
}
</script>

<style lang="scss">
// 商品列表
.goods-list {
  .goods-item {
    display: flex;
    padding: 25rpx;

    .goods-image {
      width: 190rpx;
      height: 190rpx;
    }

    .goods-info {
      flex: 1;
      font-size: 24rpx;
      // 垂直方向两端对齐
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 20rpx;

      .goods-name {
        // 多行超出隐藏
        overflow: hidden;
        -webkit-line-clamp: 2;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-box-orient: vertical;
      }

      .goods-price {
        color: #eb4450;

        // 前面的价格符号
        &::before {
          content: '￥';
          font-size: 80%;
          margin-right: 5rpx;
        }
      }
    }
  }
}

// 购物车列表项
.cart-item {
  display: flex;
  align-items: center;
  padding-left: 20rpx;
  border-bottom: 1rpx solid #ddd;
  position: relative;

  // 清除最后一项的底边
  &:last-child {
    border-bottom: none;
  }

  // 步进器外层盒子，定位实现
  .cart-count {
    position: absolute;
    // 体验优化细节：扩大盒子范围，防止用户误操作
    // background-color: pink;
    padding: 20rpx;
    bottom: 0;
    right: 0;
  }
}

// 底部操作栏
.bottom-bar {
  // 占位用
  height: 100rpx;

  // 定位的操作栏
  .bottom-bar-fixed {
    height: 80rpx;
    position: fixed;
    z-index: 99;
    left: 0;
    right: 0;
    bottom: 0;
    /* #ifdef H5 */
    bottom: 50px;
    /* #endif */

    border-top: 1px solid #eee;
    background-color: #fff;
    display: flex;
    align-items: center;
    padding: 0 20rpx;

    .select {
      .select-radio {
        font-size: 24rpx;
        color: #999;
      }
    }

    .total {
      flex: 1;
      display: flex;
      align-items: center;
      margin-left: 40rpx;

      .total-name {
        font-size: 24rpx;
      }

      .total-price {
        color: #eb4450;
      }
    }

    .account {
      background-color: #eb4450;
      color: #fff;
      font-size: 22rpx;
      width: 150rpx;
      height: 52rpx;
      border-radius: 26rpx;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
}
</style>